JPH0468204B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field: The present invention relates to the improvement of an automatic binding machine that binds mainly steel materials such as various round steel and shaped steel with wire.
The present invention relates to a double winding automatic tying machine equipped with a tying wire guide mechanism that ensures the tightening of the wire when double wrapping and tying.

Background of the Invention: Conventionally, long objects such as round steel and shaped steel have been bound by wrapping a wire around them in a single layer. Naturally, such a binding operation is performed by an automatic machine. However, in conventional single-wrap binding, depending on the external shape of the object to be bound,
In some cases, the wires become loose during transportation, causing the load to collapse, and in the case of heavy bundles or large items that are heavy per bundle, there is a risk that the wires may break.

Measures to prevent such defects include increasing the number of binding points, increasing the binding force, and increasing the size of the wire used. However, according to the former method, the time required for binding is increased, efficiency is not improved, and construction costs are increased. If the latter is used, there is a risk that the wire will stretch and break during transportation. In addition, when the wire size is increased, restrictions arise such as the binding device becoming too large and the wire being unable to be fed by rollers or the like.

In order to solve these problems, a method is needed to firmly bind the wire as a binding material without reducing its strength. As a countermeasure, the conventional 1
It is easy to think that instead of tying it up with heavy wrappings, it would be better to tie it up with double wrappings. However, it has been difficult to automatically wrap the wire around the object twice in the binding section of the conventional binding machine.

The automatic tying machine that made it possible to double-wrap the wire was invented in a prior application (patent application 181748/1986).
(No.), when the wire wound along the wire guide ring is pulled back and narrowed for bundling, priority is given to the part in front of the pullback (first guide groove: second round). The distant position that was first orbited by the target was strongly squeezed (second guide groove: 1)
It is difficult for the force to reach the pullback of the wire during the
There is a drawback that the far position (second guide groove: first round) tends to loosen, and the effect of double winding cannot be fully demonstrated.

Problem to be solved: In order to strengthen the binding force of such a double winding automatic tying machine, it is necessary to reduce the overlap between the first lap (the lap that was circled earlier) and the second lap (the lap that was lapped later). It is necessary to make the tightening force on the bundle as uniform as possible.

The present invention aims to solve such problems by making the clamping force generated by the first rotation of the wire and the clamping force generated by the second rotation of the wire as equal as possible. Our objective is to provide a double winding automatic binding machine.

Means for Solving the Problem: In order to achieve the above object, the present invention provides a method in which first and second two wire guide grooves are formed in a spiral shape inside a guide ring for wire feeding that goes around an object to be bound. The wire is fed out and passed through the first insertion hole of the known wire twisting head, and after making two turns in the order of the first wire guide groove and the second wire guide groove of the guide ring, the wire is passed through the wire twisting head. The tip of the wire is grasped and held through the second insertion hole, and then the wire is pulled back to the feeding side and wrapped around the object to be tied under tension. After the wire is cut, the wire twisting head is rotated to double wrap and twist to bind. The wire has a structure; the wire faces in the feeding direction based on the position closest to the wire twisting head, and only faces the first wire guide groove (a) first to (n-1).
(b) an n-th guide support slider is provided at a position near the first insertion hole of the wire twisting head in the wire feeding direction; Each guide support slider is supported via a support arm whose base end is pivoted on the side surface of the guide ring so that it can be tilted and retracted outward from the position facing the wire guide groove when the tension of the wire to be guided increases; Further, each of the guide support sliders is configured to be retracted from the wire guide groove in sequence from the first to the nth according to the pullback force of the wire.

Further, in the present invention, each guide support slider has a tightening force applied by the wire in the direction of the object to be bound.
It is preferable that the guide ring be configured to be able to retreat outward from the position facing the guide groove by overcoming the pulling force in the radial direction of the guide ring by an actuator selected from a spring or a power cylinder.

Function: As described above, in the device of the present invention, the wire for binding is sequentially fed in a spiral shape along the first wire guide groove and the second wire guide groove in the guide ring by the feeder, and the wire to be bound is After wrapping around the wire, when pulling the wire, the second
Since the second wire guide groove does not have a guide support slider (roller) facing it, the wire in the second wire guide groove is quickly pulled back. The portion of the wire that is wound along the first wire guide groove is received by a plurality of wire guide sliders arranged at key points facing the first wire guide groove. Therefore, the wire portion that does not immediately come into contact with the object to be bound and has been wound around the second wire guide groove side first is wound around the object to be bound. Furthermore, due to the increased tensile force acting on the wire, the wire that was wrapped first tightly binds the object to be bound. Thereafter, the first wire guide support slider loses the balance between the support force exerted by its support arm and the wire tensile force, tilts and retreats outward from the guide holding position, and the supported wire is moved to the guide support. Then, the support arms of the second, third, and n-th guide support sliders are sequentially tilted outward by the operation of the evacuation operation actuator, and the supported wires are sequentially tilted outward. By following and separating the wire, the first round of the wire also wraps along the previously wrapped part, creating a double-wound state, and then the wire is pulled back with an even binding force. Be able to unite. As a result, the wire can be wound twice and tightly bound.

Embodiment; Hereinafter, one embodiment of the apparatus of the present invention will be described in detail based on the drawings. What is shown in FIG. 1 is a front view of a double winding automatic tying machine of the present invention, in which a base support frame 2 is pivotally supported on the upper part of a front frame 1' of a main body 1 equipped with a control system.
A binding unit 3 is attached to the front lower part of the base support frame 2.

This bundling unit 3 is equipped with a wire feeder 4 and a wire twisting drive device 5, and a wire guide ring 10 having two guide grooves is attached to the front of these. In the illustrated embodiment, the wire twisting head 5' is arranged diagonally upward. However, it is not limited to this. Note that the feeder 4 and the wire twisting mechanism have a known structure.

The guide ring 10 of the binding wire is attached to the frame 1
As shown in FIGS. 1 and 2, two wire guide grooves 12 and 12' are provided, and the first wire guide groove 12 is provided at the upper position of the wire twisting head 5'. A wire is carved with a guide groove for introducing the wire that has passed through the wire once and into the second wire guide groove 12', and a guide groove for guiding the wire from the second wire guide groove 12' to the wire end insertion hole of the wire twisting head 5'. A guide switching block 13 is provided.

First wire guide groove 12 of the guide ring 10
On the other hand, as shown in FIG. 1, the guide support sliders 21, 22, 23 for wire pulling back are
They are provided in the required distribution from the far position where the wire is fed out to the near side (closer to the torsion head, hereinafter referred to as first, second, and third guide sliders in clockwise direction in the figure). Among the guide support sliders, the first guide support slider 21 is connected to the guide ring 10 in the direction of the center axis thereof via a bracket 15 attached to the side surface of the guide ring 10, as shown in FIG. That is, at the tip of a support arm 17 whose base end is supported by a pin 16 on a pair of projections 15' of a bracket 15 so as to be movable in the axial direction of the object to be bound,
It is rotatably attached with a shaft pin 19.

Support arm 1 of this first guide support slider 21
7 is the middle part, and the mounting seat 15'' of the bracket 15
A compression coil spring 18' is brought into contact with the outer surface so as to take a reaction force by a vertically installed bolt 18, and the guide support slider 21 is normally positioned so as to face the wire guide groove 12. This first guide support slider 21 is arranged at a position on the circumference of the guide ring 10 at a slightly obtuse angle of 90° with respect to the center of the wire torsion head 5' (but is not limited to this). (The same applies to each guide support slider below). Next, the second guide bearing slider 22 is inserted into a circle of the guide ring 10 with respect to the center of the wire torsion head 5' on the side surface of the guide ring 10, as shown in FIGS. Projection piece 2 on mounting seat plate 25 attached so as to be located at approximately 90° on the circumference
5' pairs, the support arms 26 whose proximal ends are supported by pins 26'' are rotatably attached by shaft pins 27 so as to face the wire guide grooves 12 at their distal ends. The fork piece 3 at the end of the rod 30' of the fluid pressure cylinder 30 is supported by a pin at the upper end of the bracket 28 which stands on the mounting seat plate 25 at its rear end on the connecting piece 26' projecting from the intermediate surface.
1 is connected, and the second guide support slider 22 is connected to the wire guide groove 12 by this fluid pressure cylinder 30.
It is configured so that it can be evacuated from above. Furthermore, a third guide slide 23 is arranged adjacent to the wire twisting head 5'. The support arm 34 of this third guide support slider 23 is formed to be horizontally long due to its position, but for other mounting structures, the second guide support slider 22
The support arm 26 and its operating fluid pressure cylinder 30 are attached in a similar structure. Therefore, the same parts are given the same reference numerals as those of the second guide support slider 22.

In addition, at an intermediate position between the wire torsion head 5' and the first guide receiver slider 21, and an intermediate position between the first guide receiver slider 21 and the second guide receiver slider 22, A plurality of auxiliary guide rollers 24 are arranged for each wire introduction. The supporting pieces 35 of the 24 rows of auxiliary guide rollers are fixed to the mounting pieces 36 fixed to the side surfaces of the guide ring 10.
A return spring 38, whose base end is pivotally attached to the stud bolt 37 to take a reaction force, is always opposed to the wire guide grooves 12 and 12', so that the wire is When subjected to a constriction force, the support piece 3 resists the pressing force of the return spring 38.
5, the guide roller 24 is retracted to the outside, and the wire 40 is removed from the wire guide groove 12 or 12'.
(the first
(see Figures and Figure 5).

Second wire guide groove 1 of the guide ring 10
2', so that only the above-mentioned auxiliary guide roller 24 corresponds to the wire twisting head 5', the wire sending side and the wire 40 tip receiving side are separated by a required distance from each other in the above-described manner. It is arranged in. By doing so, when the wire is fed out, the wire does not come into contact with the groove bottom of the second wire guide groove 12', and the wire floats toward the inner diameter side of the guide ring 10. It serves as a lid to prevent the wire from deviating from the wire guide groove 12'. Also, at the final part of the second round, the guide roller section placed above the wire twisting head 5' ensures that the tip of the wire can enter the wire end insertion hole provided in the wire twisting head 5'. It is designed to cause the wire 40 to run along the bottom of the wire guide groove.

According to the present invention configured in this way, the wire 4 fed by the feeder 4 as in the conventional case.
0 (see FIG. 6) passes through an unillustrated insertion hole on one side of the wire twisting head 5' and first enters the first wire guide groove 12 of the guide ring 10. When the wire 40 traveling along the first wire guide groove 12 reaches the wire guide switching block 13 position, the wire 40 is switched to the second wire guide groove 12' side by the switching block 13, and the wire 40 is switched to the second wire guide groove 12' side by the switching block 13. After making one round along the wire guide groove 12', the end of the wire 40 enters an end insertion hole (not shown) of the wire twisting head 5'.
In this state, the control mechanism operates in the same manner as before to stop the wire 40 from being fed out and bend the tip of the wire 40 (these are performed by sequentially operating known mechanisms).

After that, reverse feeder 4 and wire 4
Pull back 0. Then, this wire 40 becomes the object to be bound A (for convenience, the outer shape is circular in cross section)
wrapped around. At this time, the first circumference portion of the wire 40 is connected to the first, second, and third wire guide grooves arranged opposite to the first wire guide groove 12 of the guide ring 10.
By each guide support slider 21, 22, 23,
The wire (second round) portion on the second wire guide groove 12' side, which is supported as shown in FIG. The material is pulled together and wrapped around the object A first.

Furthermore, by applying a strong pulling force to the second turn of the wire 40, a tightening force is added, and this tightening tension increases, causing the wire 40 to tighten.
The first round part of 0 is each guide support slider 21, 2
2, 23, first the first guide support slider 21
Since a strong pushing force is applied to the first
The shaft pin 19 supporting the guide support slider 21 of
Resisting the force of the return coil spring 18' acting on the support arm 17 through the support arm 17, the support arm 17 is retracted outward with the guide support slider 21 using the pin 16 as a fulcrum due to the tightening action of the wire 40. , the wire 40 is released from the supported state. At this time, each of the second and third guide support sliders 22, 23
Since the support arms 26 and 34 of both of them are capable of adjusting the tilting force by the hydraulic cylinders 30 and 30, respectively, the wire 4
0 is kept in a state that prevents it from escaping. Therefore, the first guide support slider 21 first touches the wire 4.
0 will be removed. The hydraulic cylinder 30 of the second guide support slider 22 is then actuated by a control mechanism (not shown) to retract its piston rod 30', causing the support arm 26 to move the pivot pin 26''. It is tilted outward as a reference, and a shaft pin 27 is attached to the tip of the support arm 26.
The guide support slider 22 supported by the wire guide groove 12 is retracted outward from the wire guide groove 12, and the wire
to take it out. Subsequently, in the same manner, the third guide support slider 23 is tilted outward via the support arm 34 by the hydraulic cylinder 30, and is retracted outward from above the wire guide groove 12. As a result, the first round of the wire 40 is also wound around the object A.

During this time, a constant tension is applied to the wire 40, and the wire 40 is tightened without any loosening in the second wrap around the wire 40, and is finally pulled into a cutter (not shown) attached to the wire twisting head 5'. The wire 40 is cut on the supply side by the action of , and then the wire twisting head 5' is rotated by the release action of a stopper (not shown) that has stopped the rotation of the wire twisting head 5'. The objects to be bound will be firmly bound.

When the wire twisting head 5' is rotated the required number of revolutions, a stopper (not shown) fits into a locking groove (not shown) in the wire twisting head 5' to stop the rotation, and the wire 40 end bending operation section, etc. It will be returned to its original position and will be ready for the next binding operation.

After the wire 40 is removed, each guide support slider 21, 22, 23 and each auxiliary guide roller 24, 24 facing the guide ring 10 wire guide groove 12 are also moved.
It is immediately returned to its original position and ready for the next operation.

Effects of the Invention: As described above, according to the present invention, when the binding wire is wrapped twice around the object to be bound, when the wrapped wire is tightened, the tensile force is made equal between the two turns. A guide receiver slider is arranged at the first wraparound part so that the wire section in the first loop can be pulled back later, and each guide receiver slider is connected to the wire in order from the farthest position. By releasing the engagement, it is now possible to securely perform strong binding without applying excessive tension to the binding wire using an automatic binding machine.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the double-wrap binding machine of the present invention, Fig. 2 is a longitudinal sectional view of the wire guide ring, Fig. 3 is an enlarged sectional view of Fig. 1, and Fig. 4 is a cross-sectional view of the wire guide ring. 1, FIG. 5 is an enlarged sectional view of the auxiliary guide roller mounting portion, and FIG. 6 is a view showing a bundling operation mode. 1... Binding machine body, 3... Binding unit, 4...
...Wire feeder, 5...Wire twisting drive machine, 5'...Wire twisting head, 10...
...Wire guide ring, 11...Frame, 12
...First wire guide groove, 12'...Second wire guide groove, 13...Switching block, 15
...Bracket, 15'...Protrusion, 16...Pin,
17, 26, 34... Support arm, 18'... Returning coil spring, 19, 27... Axis pin, 24...
... Guide roller, 21, 22, 23 ... Wire guide support slider, 26' ... Connection piece, 28 ...
Bracket, 30...Fluid pressure cylinder, 30'...
...Piston rod, 31...Fork piece, 35...
...Support piece, 40...Wire, A...Object to be bound.

Claims (1)

[Scope of Claims] 1. Two wire guide grooves, first and second, are spirally provided inside a wire feeding guide ring that goes around the object to be bound, and the wire is fed out to form a known wire twisting head. through the first insertion hole of the guide ring, the first wire guide groove of the guide ring, and the second wire guide groove of the guide ring.
After making two turns in the order of the wire guide groove, the tip of the wire is grasped through the second insertion hole of the wire twisting head, and then the wire is pulled back to the feeding side and wound around the object to be tied under tension, and the wire is cut. It has a structure in which the wire twisting head is rotated to bind the wire in a double winding and twisting manner. First to (n-1)th guide support sliders are arranged, and (b) the nth guide is placed at a position near the wire before it reaches the first insertion hole of the wire twisting head in the feeding direction. A support slider is provided; each of the guide support sliders has its base end pivoted on the guide ring side so that it can be tilted and retracted outward from a position facing the wire guide groove when the tension of the wire to be guided increases. The guide support slider is supported via a support arm that is attached to the wire guide groove, and each guide support slider is set to be retracted from the wire guide groove in sequence from the first to the nth guide slider according to the pullback force of the wire. Double winding automatic binding machine. 2. Each of the guide support sliders has a tightening force in the direction of the object to be bound by the wire that exceeds a tensile force in the radial direction of the guide ring by an actuator selected from a spring or a power cylinder.
The double winding automatic binding machine according to claim 1, wherein the double winding automatic binding machine is configured to be able to retreat from the position facing the guide groove to the outer periphery.